CN210343712U - Device for preventing sealing dry rotation of centrifugal pump - Google Patents
Device for preventing sealing dry rotation of centrifugal pump Download PDFInfo
- Publication number
- CN210343712U CN210343712U CN201920920892.5U CN201920920892U CN210343712U CN 210343712 U CN210343712 U CN 210343712U CN 201920920892 U CN201920920892 U CN 201920920892U CN 210343712 U CN210343712 U CN 210343712U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- pump
- barrel
- temperature sensor
- sealing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a device for preventing the sealing dry rotation of a centrifugal pump, which comprises a main shaft, wherein the main shaft is supported and installed in a suspension by a bearing, and one end of the main shaft extends out and is used for connecting a prime motor; the two ends of the suspension are rotatably installed with the main shaft through bearings, the outer ends of the bearings are provided with bearing glands for axial positioning, the main shaft extending into the pump body is provided with an impeller, a sealing unit is installed between the pump cover and the main shaft, the outer side of the sealing unit is provided with a temperature sensor, the temperature sensor is communicated with a sealing cavity, a connecting frame is installed between the bearings and the pump cover, and a water flow switch is installed at the position of an inlet pipe of the pump body. The utility model discloses a temperature sensor, real-time supervision sealing unit's temperature rise is established ties with water flow switch through temperature sensor simultaneously, and controller outage, machine pump shut down, avoid the machine pump to appear doing the commentaries on classics under unmanned on duty's the condition and cause the damage of equipment.
Description
The technical field is as follows:
the utility model relates to a centrifugal pump field mainly relates to a device that prevents that centrifugal pump seals futilely to change.
Background art:
when the centrifugal pump operates, a sealing unit such as a mechanical seal is needed to seal a pump cavity to prevent high-pressure media from leaking, rapid friction exists between the sealing unit and the rotating pump shaft or between the sealing unit and the rotating pump shaft, the friction needs to be lubricated and cooled by the media or external cooling liquid, and if the sealing unit is not lubricated and cooled when the centrifugal pump operates, the sealing unit can rapidly fail, so that the mechanical pump can be damaged. In actual production, the mechanical pump rarely has 24-hour manual operation, if the inlet pipe of the centrifugal pump leaks, the medium in the pump cavity is gradually reduced until the pumping capacity is completely lost, or the mobile pump truck is operated in the field, the medium is likely to be completely pumped out, and the pump still runs. This can quickly cause equipment damage, which can be catastrophic if the pump is subjected to emergency tasks.
The utility model has the following contents:
the utility model discloses the purpose is exactly in order to compensate prior art's defect, provides a device that prevents that centrifugal pump seal from doing the commentaries on classics, avoids the machine pump to appear doing the commentaries on classics and causes the damage of equipment under unmanned on duty's the condition.
The utility model discloses a realize through following technical scheme:
a device for preventing the sealing dry rotation of a centrifugal pump comprises a main shaft, a main shaft and a motor, wherein the main shaft is supported and installed in a suspension by a bearing, and one end of the main shaft extends out for connecting a prime motor; the method is characterized in that: the two ends of the suspension are rotatably installed with the main shaft through bearings, the outer ends of the bearings are provided with bearing glands for axial positioning, the main shaft extending into the pump body is provided with an impeller and is sealed and fixed through a pump cover, a sealing unit is installed between the pump cover and the main shaft, the outer side of the sealing unit is provided with a temperature sensor, the temperature sensor is communicated with a sealing cavity, a connecting frame is installed between the bearings and the pump cover, and a water flow switch is installed at the position of an inlet pipe of the pump body.
The sealing unit is including the quiet ring and the rotating ring of mutually supporting, quiet ring is installed in the pump cover, it is sealed by O type circle between quiet ring and the pump cover, the rotating ring is installed on the main shaft, by the sealed transmission of rubber spare between rotating ring and the main shaft, and through the metalwork parcel between rotating ring and the rubber spare, the metalwork overcoat is equipped with the spring that is used for compensating the compression volume that the machine sealed.
The metal piece is of a double-layer barrel structure and comprises an inner barrel and an outer barrel which are fixedly connected through a connecting rib plate, the inner barrel is clamped in a clamping groove of the rubber piece, the outer barrel is a step barrel, one end of the step barrel is clamped on the movable ring, and the other end of the step barrel is connected with the inner barrel.
The principle is as follows: the temperature sensor is arranged at the outer side position of the sealing unit in the sealing cavity, the temperature rise of the sealing unit is monitored in real time, the water flow switch is arranged at the inlet position of the centrifugal pump, and the temperature sensor is connected with the water flow switch in series. The temperature of the sealing unit is kept within a certain range by lubricating and cooling the medium when the pump normally operates. When the medium of source is done by the pump, the sealed unit loses lubrication and cooling and appears doing the commentaries on classics, and the rivers switch that is located the pump import at this moment loses the striking of rivers and the intercommunication that resets, and sealed unit can rapid heating up, and temperature sensor monitors the unusual production signal transmission of temperature to the controller this moment, controller outage, machine pump stop operation.
The utility model has the advantages that:
the utility model has the advantages of reasonable design, through temperature sensor, the temperature rise of real-time supervision sealing unit is established ties with water flow switch through temperature sensor simultaneously, and controller outage, machine pump shut down operation avoid the machine pump to appear doing the damage that changes and cause equipment under unmanned on duty's the condition.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the sealing unit.
The specific implementation mode is as follows:
see the drawings.
A device for preventing the sealing dry rotation of a centrifugal pump comprises a main shaft 2, wherein the main shaft 2 is supported and installed in a suspension 1 by a bearing 3, and one end of the main shaft extends out for connecting a prime motor; the utility model discloses a temperature sensor, including pump cover 6, bearing 3, pump cover 2, temperature sensor 12 and seal chamber intercommunication, install link 5 between bearing 3 and the pump cover 6, pump body 7 suction segment 9 is connected with import pipe 10, and import pipe 10 position installs water flow switch 11, and the outer end of bearing installs the bearing gland who is used for axial positioning, stretches into and installs impeller 8 on the main shaft in the pump body 7, and seals fixedly through pump cover 6, install sealing unit 4 between pump cover 6 and the main shaft 2, sealing unit 4 installs the outside, temperature sensor 12 and seal chamber intercommunication, install connection frame 5 between bearing 3 and the pump cover 6, pump body 7 suction segment 9 is connected with.
The sealing unit is including the quiet ring 12 and the rotating ring 13 of mutually supporting, quiet ring 12 is installed in pump cover 6, sealed 17 by O type circle between quiet ring 12 and the pump cover 6, rotating ring 13 installs on the main shaft, seals the transmission by rubber spare 16 between rotating ring 13 and the main shaft, and wraps up through metalwork 14 between rotating ring 13 and the rubber spare 16, 14 overcoat of metalwork is equipped with the spring 15 that is used for compensating the compression amount that the machine sealed.
The metal part is of a 14-layer double-layer cylinder structure and comprises an inner cylinder and an outer cylinder which are fixedly connected through a connecting rib plate, the inner cylinder is clamped in a clamping groove of the rubber part, the outer cylinder is a step cylinder, one end of the cylinder is clamped on the movable ring, and the other end of the cylinder is connected with the inner cylinder.
Claims (3)
1. A device for preventing the sealing dry rotation of a centrifugal pump comprises a main shaft, a main shaft and a motor, wherein the main shaft is supported and installed in a suspension by a bearing, and one end of the main shaft extends out for connecting a prime motor; the method is characterized in that: the two ends of the suspension are rotatably installed with the main shaft through bearings, the outer ends of the bearings are provided with bearing glands for axial positioning, the main shaft extending into the pump body is provided with an impeller and is sealed and fixed through a pump cover, a sealing unit is installed between the pump cover and the main shaft, the outer side of the sealing unit is provided with a temperature sensor, the temperature sensor is communicated with a sealing cavity, a connecting frame is installed between the bearings and the pump cover, and a water flow switch is installed at the position of an inlet pipe of the pump body.
2. The apparatus for preventing dry running of a centrifugal pump seal according to claim 1, wherein: the sealing unit is including the quiet ring and the rotating ring of mutually supporting, quiet ring is installed in the pump cover, it is sealed by O type circle between quiet ring and the pump cover, the rotating ring is installed on the main shaft, by the sealed transmission of rubber spare between rotating ring and the main shaft, and through the metalwork parcel between rotating ring and the rubber spare, the metalwork overcoat is equipped with the spring that is used for compensating the compression volume that the machine sealed.
3. The apparatus for preventing dry running of a centrifugal pump seal according to claim 2, wherein: the metal piece is of a double-layer barrel structure and comprises an inner barrel and an outer barrel which are fixedly connected through a connecting rib plate, the inner barrel is clamped in a clamping groove of the rubber piece, the outer barrel is a step barrel, one end of the step barrel is clamped on the movable ring, and the other end of the step barrel is connected with the inner barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920920892.5U CN210343712U (en) | 2019-06-19 | 2019-06-19 | Device for preventing sealing dry rotation of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920920892.5U CN210343712U (en) | 2019-06-19 | 2019-06-19 | Device for preventing sealing dry rotation of centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210343712U true CN210343712U (en) | 2020-04-17 |
Family
ID=70186511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920920892.5U Active CN210343712U (en) | 2019-06-19 | 2019-06-19 | Device for preventing sealing dry rotation of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210343712U (en) |
-
2019
- 2019-06-19 CN CN201920920892.5U patent/CN210343712U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101713461A (en) | Dry gas sealing device for technical screw compressor and application system thereof | |
| WO2020156089A1 (en) | Deep water pump having pressure compensation function | |
| CN109340116A (en) | Nitrogen-sealed screw vacuum pump built in exhaust side | |
| CN203394838U (en) | Industrial pump for nuclear power station | |
| CN201934389U (en) | Boracic acid conveying pump for nuclear power plant | |
| CN210343712U (en) | Device for preventing sealing dry rotation of centrifugal pump | |
| CN204082560U (en) | Crude oil pipeline conveying oil line pump | |
| CN209083565U (en) | Nitrogen-sealed screw vacuum pump built in exhaust side | |
| KR101727163B1 (en) | Pump shaft seal using sealing rings and a bellows for retention of bearing lubricant | |
| CN207393485U (en) | A kind of horizontal multi-stage centrifugal pump | |
| CN212509524U (en) | Mechanical sealing device suitable for variable working condition upstream pumping | |
| CN216950909U (en) | Chloromethane and chloroethylene high-speed centrifugal turbine compressor | |
| CN210240097U (en) | Mechanical seal capable of dry rotation for centrifugal pump | |
| CN201281034Y (en) | Bearing arrangement of fluid delivery pump | |
| CN203751024U (en) | Improved rotating joint for uncoiler | |
| CN209704858U (en) | A kind of deep water water pump with pressure compensation | |
| CN210050002U (en) | SF6 recovery unit with frequency conversion recovery pump | |
| CN106382236A (en) | Leakage-free pump | |
| CN207377809U (en) | A kind of side goes out radial direction subdivision double suction centrifugal pump into side | |
| CN220706011U (en) | Efficient double-support vertical split pump device with built-in bearing | |
| CN210240096U (en) | Centrifugal pump cavity seal structure | |
| CN203548250U (en) | Magnetic drive submerged pump | |
| CN206816457U (en) | It is a kind of that there is cooling and the Mechanical Sealed Type Pulp pump of warning function | |
| CN203809287U (en) | Vertically-suspended type three-screw pump | |
| CN218093571U (en) | Integrated mechanical seal for double-suction pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |